Letter Sequence Meeting |
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Initiation
- Request, Request, Request, Request, Request, Request
- Acceptance...
- Supplement, Supplement, Supplement, Supplement, Supplement, Supplement
Results
Other: ML20258A284, ML20269A465, ML20276A192, ML20303A199, ML21036A060, ML21067A504, ML21067A507, ML21084A182, ML21091A004, ML21097A027, ML21145A217, ML21217A187, ML21239A064, ML21239A066, ML21239A068, ML21256A067, ML21256A069, ML21312A002, ML21312A003, ML21312A007, PMNS20211071, Discussion Between NRC and Dominion Regarding the North Anna Subsequent License Renewal - Safety Issue - Cyclic Fatigue, PMNS20211128, Discussion Between NRC and Dominion Regarding the North Anna Subsequent License Renewal - an Inconsistency in Documentation Regarding Reactor Coolant Pump Code Case N 481, TLAA 4.7.6
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MONTHYEARML20246G6972020-08-24024 August 2020 Application for Subsequent Renewed Operating Licenses Project stage: Request ML20269A4652020-10-0606 October 2020 SLRA - Portal Letter Project stage: Other ML20276A1922020-10-0909 October 2020 Subsequent License Renewal Aging Management Audit Plan Project stage: Other ML20258A2842020-10-13013 October 2020 SLRA - Acceptance and Opportunity for Hearing Letter Project stage: Other ML20303A1992020-10-29029 October 2020 Subsequent License Renewal Safety Project Management Assignment Project stage: Other ML20352A3942020-12-17017 December 2020 Proposed License Amendment Request to Change Battery Surveillance Requirements Project stage: Request ML21035A3032021-02-0404 February 2021 (Naps), Units 1 and 2 - Update to Subsequent License Renewal Application (SLRA) Supplement 1 Project stage: Supplement ML21063A5602021-03-0404 March 2021 Final Request for Additional Information Set 1 - North Anna SLRA Safety Review (EPID L-2020-SLR-0000) - Enclosure Project stage: RAI ML21063A5522021-03-0404 March 2021 Final Request for Additional Information Set 1 - North Anna SLRA Safety Review (EPID L-2020-SLR-0000) - Email Project stage: RAI ML21067A5072021-03-0808 March 2021 Final Request for Confirmation of Information (RCI) Set 1 - North Anna SLRA Safety Review (EPID No. L-2020-SLR-0000) - Enclosure Project stage: Other ML21067A5042021-03-0808 March 2021 Final Request for Confirmation of Information (RCI) Set 1 - North Anna SLRA Safety Review (EPID No. L-2020-SLR-0000) - Email Project stage: Other ML21076B0252021-03-17017 March 2021 Update to Subsequent License Renewal Application, Supplement 2 Project stage: Supplement ML21084A1822021-03-24024 March 2021 Subsequent License Renewal Application Response to NRC Requests for Confirmation of Information for the Safety Review - Set 1 Project stage: Other ML21091A0032021-04-0101 April 2021 Final Request for Additional Information Set 2 - North Anna SLRA Safety Review (EPID No. L-2020-SLR-0000) - Enclosure 1 - RAIs Project stage: RAI ML21091A0042021-04-0101 April 2021 SLRA Safety Review - Withdrawn Requests for Information (EPID No. L-2020-SLR-0000) - Enclosure 2 Project stage: Other ML21091A0022021-04-0101 April 2021 Final Request for Additional Information Set 2 - North Anna SLRA Safety Review (EPID No. L-2020-SLR-0000) - Email Project stage: RAI ML21091A1872021-04-0101 April 2021 Response to NRC Request for Additional Information Regarding Safety Review - Set 1 & Clarification to Aging Management of Fire Protection System Lined Ductile Iron Valves Project stage: Supplement ML21036A0602021-04-0808 April 2021 Report for the Aging Management Audit Regarding the Subsequent License Renewal Application Review Project stage: Other ML21097A0272021-04-14014 April 2021 Request for Withholding from Public Disclosure Regarding Subsequent License Renewal Application Project stage: Other ML21104A0372021-04-15015 April 2021 Request for Withholding Information Regarding Subsequent License Renewal Application Project stage: Withholding Request Acceptance ML21119A2872021-04-29029 April 2021 (Naps), Unit 1 and 2 - Subsequent License Renewal Application (SLRA) Response to NRC Request for Additional Information Safety Review - Set 2 and Flow Accelerated Corrosion Program Enhancement Completion Project stage: Response to RAI ML21119A3402021-04-29029 April 2021 Preparation and Scheduling of Operator Licensing Examinations Project stage: Request ML21123A2972021-05-0303 May 2021 Final Request for Additional Information Set 3 - North Anna SLRA Safety Review (EPID No. L-2020-SLR-0000) - E-mail Project stage: RAI ML21123A2982021-05-0303 May 2021 Final Request for Additional Information Set 3 - North Anna SLRA Safety Review (EPID No. L-2020-SLR-0000) - Enclosure Project stage: RAI PMNS20210548, Discussion of Dominion'S Response to Select Staff RAIs on North Anna Subsequent License Renewal Application2021-05-12012 May 2021 Discussion of Dominion'S Response to Select Staff RAIs on North Anna Subsequent License Renewal Application Project stage: RAI ML21145A2172021-05-13013 May 2021 Discussion on May 13, 2021 with Dominion on Select Staff RAIs on North Anna Subsequent License Renewal Application - Dominion Slides Project stage: Other ML21132A2892021-05-13013 May 2021 SLRA RAI Response Public Meeting Project stage: RAI PMNS20210666, Discussion of Dominion'S Response to Select Staff RAIs on North Anna Subsequent License Renewal Application2021-05-27027 May 2021 Discussion of Dominion'S Response to Select Staff RAIs on North Anna Subsequent License Renewal Application Project stage: RAI ML21221A1482021-05-27027 May 2021 Meeting Summary: Discussion of Dominion'S Response to Select Staff Requests for Additional Information on Subsequent License Renewal Application (EPID No. L-2020-SLR-0000) - NRC Slides Project stage: RAI ML21221A1542021-05-27027 May 2021 Meeting Summary: Discussion of Dominion'S Response to Select Staff Requests for Additional Information on Subsequent License Renewal Application (EPID No. L-2020-SLR-0000) - Dominion Slides Project stage: Meeting ML21147A2932021-05-27027 May 2021 (Naps), Units 1 and 2 Subsequent License Renewal Application (SLRA) Response to NRC Request for Additional Information Safety Review - Set 3 and Administrative Change to SLRA Table A4.0-1, Item 25 Project stage: Response to RAI ML21145A2122021-06-0909 June 2021 Meeting Summary: Discussion of Dominion'S Response to Select Staff Requests for Additional Information on Subsequent License Renewal Application (EPID No. L-2020-SLR-0000) - Memoranda Project stage: RAI ML21145A2132021-06-0909 June 2021 Meeting Summary: Discussion of Dominion'S Response to Select Staff Requests for Additional Information on Subsequent License Renewal Application (EPID No. L-2020-SLR-0000) - Enclosure 1 - Summary Project stage: RAI ML21145A2152021-06-0909 June 2021 Meeting Summary: Discussion of Dominion'S Response to Select Staff Requests for Additional Information on Subsequent License Renewal Application (EPID No. L-2020-SLR-0000) - Enclosure 2 - List of Attendees Project stage: RAI ML21166A3512021-06-15015 June 2021 Safety RAIs - Set 4 - Draft Project stage: Draft RAI PMNS20210777, Discussion of Dominion'S Response to Select Staff RAIs on North Anna Subsequent License Renewal Application - Topics to Be Determined2021-06-15015 June 2021 Discussion of Dominion'S Response to Select Staff RAIs on North Anna Subsequent License Renewal Application - Topics to Be Determined Project stage: RAI PMNS20210778, Discussion of Dominion'S Response to Select Staff RAIs on North Anna Subsequent License Renewal Application - Topics to Be Determined2021-06-23023 June 2021 Discussion of Dominion'S Response to Select Staff RAIs on North Anna Subsequent License Renewal Application - Topics to Be Determined Project stage: RAI ML21174A3042021-06-23023 June 2021 SLRA RAI Response Public Meeting - 21-06-24 Project stage: RAI ML21174A1952021-06-23023 June 2021 Safety RAIs - Set Y - Draft - Enclosure Project stage: Draft RAI ML21188A1652021-07-0707 July 2021 Final Request for Additional Information Set 4 - North Anna SLRA Safety Review (EPID No. L-2020-SLR-0000) - Enclosure Project stage: RAI ML21188A1632021-07-0707 July 2021 Final Request for Additional Information Set 4 - North Anna SLRA Safety Review (EPID No. L-2020-SLR-0000) - Email Project stage: RAI ML21210A3962021-07-29029 July 2021 (Naps), Units 1 and 2 - Subsequent License Renewal Application (SLRA) Response to NRC Request for Additional Information Safety Review - Set 4 and Supplement 3 Project stage: Supplement ML21217A1872021-08-0505 August 2021 (Naps), Units 1 and 2 - Subsequent License Renewal Application First 10 CFR 54.21 (B) Annual Amendment Project stage: Other ML21221A1362021-08-10010 August 2021 Meeting Summary: Discussion of Dominion'S Response to Select Staff Requests for Additional Information on Subsequent License Renewal Application Project stage: RAI ML21221A1382021-08-10010 August 2021 Meeting Summary: Discussion of Dominion'S Response to Select Staff Requests for Additional Information on Subsequent License Renewal Application (EPID No. L-2020-SLR-0000) - Meeting Summary Project stage: RAI ML21221A1412021-08-10010 August 2021 Meeting Summary: Discussion of Dominion'S Response to Select Staff Requests for Additional Information on Subsequent License Renewal Application (EPID No. L-2020-SLR-0000) - Attendees Project stage: RAI PMNS20211071, Discussion Between NRC and Dominion Regarding the North Anna Subsequent License Renewal - Safety Issue - Cyclic Fatigue2021-08-13013 August 2021 Discussion Between NRC and Dominion Regarding the North Anna Subsequent License Renewal - Safety Issue - Cyclic Fatigue Project stage: Other ML21225A5642021-08-13013 August 2021 Discussion Point for Public Meeting Regarding Fire Protection Piping Cyclic Loading - Presentation Project stage: Meeting ML21225A5512021-08-13013 August 2021 Discussion Point for Public Meeting Regarding Fire Protection Piping Cyclic Loading - Transmittal E-mail Project stage: Meeting ML21238A0942021-08-25025 August 2021 Draft Request for Additional Information Set Z - North Anna SLRA Safety Review (EPID No. L-2020-SLR-0000) - Email Project stage: Draft RAI 2021-04-29
[Table View] |
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Category:Meeting Briefing Package/Handouts
MONTHYEARML24029A2362024-01-30030 January 2024 Preliminary Results of the Environmental Review, Subsequent License Renewal ML23338A1522023-12-0707 December 2023 Public Meeting Slides for North Anna and Surry Emergency Plan Augmentation Times License Amendment Request ML23255A0992023-09-15015 September 2023 Slides for September 15, 2023 Public Meeting on Poanhi Seismic Evaluations ML23103A3482023-04-14014 April 2023 Annual Assessment Meeting Presentation for North Anna and Surry ML21221A0332022-06-17017 June 2022 Meeting Summary: Discussion of Dominion'S Response to Select Staff Requests for Additional Information on Subsequent License Renewal Application (EPID No. L-2020-SLR-0000) - NRC Slides ML21174A3042021-06-23023 June 2021 SLRA RAI Response Public Meeting - 21-06-24 ML21221A1542021-05-27027 May 2021 Meeting Summary: Discussion of Dominion'S Response to Select Staff Requests for Additional Information on Subsequent License Renewal Application (EPID No. L-2020-SLR-0000) - Dominion Slides ML21145A2172021-05-13013 May 2021 Discussion on May 13, 2021 with Dominion on Select Staff RAIs on North Anna Subsequent License Renewal Application - Dominion Slides ML21132A2892021-05-13013 May 2021 SLRA RAI Response Public Meeting ML21034A5972021-02-10010 February 2021 External Presentation Am Atkinson_Nrc ISG-06 Meeting Dominion Digital IC Project 02102021 ML20288A3472020-10-14014 October 2020 (COVID-19) Emergency Preparedness Exemption Pre-Application Meeting ML20099F2992020-04-0909 April 2020 NRC Slides for North Anna pre-app April 9 ML20099F2412020-04-0909 April 2020 Co., NRC Safety Pre& 8208;Application Meeting North Anna Power Station (NAPS) ML20098B6022020-04-0707 April 2020 Annual Assessment Meeting Presentation ML19297D1872019-11-18018 November 2019 Pre-Application Meeting - Dominion Slides ML18320A2502018-11-20020 November 2018 50.90 License Amendment Request - Dominion Fleet EAL Scheme Changes, November 20, 2018 Public Meeting ML18141A3072018-05-21021 May 2018 18 - SLR Status ML17123A2092017-05-0303 May 2017 Summary of Meeting to Discuss Annual Assessment of the North Anna Power Station, Units 1 and 2 with the Public for the Period of January 1, 2016 Through December 31, 2016 ML16124A7582016-05-0303 May 2016 April 14, 2016, Summer of Public Meeting - North Anna, Units 1 and 2 ML16124A7632016-05-0303 May 2016 April 14, 2016, Summary of Public Meeting - North Anna Power Station, Units 1 and 2 ML16104A3822016-04-26026 April 2016 New Fuel Storage Rack & SFP Criticality Analysis for April 26th 2016 Scheduled Category 1, Pre-Submittal Public Teleconference ML16104A3872016-04-13013 April 2016 Criticality Analysis Checklist for North Anna ML15273A4292015-09-29029 September 2015 Revised Slides for September 29, 2015 Meeting with Dominion Re North Anna ISFSI License Renewal ML15153A0452015-05-13013 May 2015 Revised North Anna ISFSI Presentation Slides - TN-32 High Burnup Dry Storage Research Project, May 13, 2015 (Tom Brookmire) ML15133A0822015-05-13013 May 2015 ISFSI Presentation Slides - TN-32 High Burnup Dry Storage Research Project, May 13, 2015 (Tom Brookmire) ML15128A5462015-05-0808 May 2015 Summary of Public Meeting with North Anna, Units 1 and 2 to Discuss the Annual Assessment with the Public ML14101A1202014-04-11011 April 2014 Public Meeting Summary - North Anna Power Station, Docket Nos. 50-338, 50-339 ML14058B1762014-03-0606 March 2014 Presentation Slides - North Anna ISFSI - High Burnup Dry Storage Confirmatory Data Project, TN-32 Storage Cask, Tom Brookmire, March 6, 2014, Docket No. 72-16, TAC No: L24886 ML14071A1672014-01-28028 January 2014 Enclosure 2: Presentation Slides - North Anna ISFSI TN-32 Cask and Pad 1 Assessments Following August 23, 2011, Central Virginia Earthquake ML13159A0092013-06-0404 June 2013 Notable Failures in Nondustructive Testing - June 4, 2013 Public Meeting ML12257A2002012-09-11011 September 2012 2-North Anna Extent of Condition Presentation 9-7-12 Sept 10 ML12257A2342012-09-11011 September 2012 5-Hacker - North Anna Mockup and Search Unit Action Presentation Sept 10 ML12131A5052012-05-0909 May 2012 Presentation for 2011 North Anna EOC Annual Assessment Meeting ML11305A0452011-11-0101 November 2011 Region II - North Anna Public Meeting Slides ML11305A0622011-11-0101 November 2011 Restart Readiness, Public Meeting PR2 ML11276A0242011-10-0303 October 2011 Slides-North Anna AIT Public Meeting October 3, 2011 ML1127701352011-10-0303 October 2011 Ltr to D. Heacock Re Participation in the Commission Meeting on the North Anna Plant on 10/21/11 ML11252A0062011-09-0808 September 2011 Dominion'S Slides Earthquake Response and North Anna Restart Readiness Demonstration Plan ML1124205512011-08-30030 August 2011 Seismic Event ML1110304982011-04-13013 April 2011 Public Meeting Handouts ML1110304942011-04-13013 April 2011 Public Meeting Attendees ML1032204442010-11-18018 November 2010 Public Meeting Summary - North Anna Power Station ML1020100212010-07-14014 July 2010 Nucler Power Station, Units 1 and 2, Westinghouse RFA-2 Fuel Transition Licensing Meeting Presentation Slides ML1012600332010-05-0505 May 2010 Meeting Posters ML1012600342010-05-0505 May 2010 Public Mtg. Slides ML0917610472009-08-0505 August 2009 ECCS Preacs Filtration Presentation ML0911000392009-04-17017 April 2009 Notice of Public Meeting Category 1 - Annual Assessment of North Anna Power Station ML0820501832008-07-23023 July 2008 Meeting Announcement - Summary of Public Meeting Category 1 - Performance Discussion Meeting, North Anna Power Station ML0812008742008-03-24024 March 2008 Annual Assessment Meeting Reactor Oversight Program - Cy 2007 ML0730400332007-11-0101 November 2007 Public Meeting Slides for Meeting with Dominion Nuclear 2024-01-30
[Table view] Category:Slides and Viewgraphs
MONTHYEARML24029A2362024-01-30030 January 2024 Preliminary Results of the Environmental Review, Subsequent License Renewal ML23338A1522023-12-0707 December 2023 Public Meeting Slides for North Anna and Surry Emergency Plan Augmentation Times License Amendment Request ML23255A0992023-09-15015 September 2023 Slides for September 15, 2023 Public Meeting on Poanhi Seismic Evaluations ML23103A3482023-04-14014 April 2023 Annual Assessment Meeting Presentation for North Anna and Surry ML21221A0332022-06-17017 June 2022 Meeting Summary: Discussion of Dominion'S Response to Select Staff Requests for Additional Information on Subsequent License Renewal Application (EPID No. L-2020-SLR-0000) - NRC Slides ML22091A0902022-04-0101 April 2022 Combined 2021 Assessment Meeting Slides ML21221A1542021-05-27027 May 2021 Meeting Summary: Discussion of Dominion'S Response to Select Staff Requests for Additional Information on Subsequent License Renewal Application (EPID No. L-2020-SLR-0000) - Dominion Slides ML21221A1482021-05-27027 May 2021 Meeting Summary: Discussion of Dominion'S Response to Select Staff Requests for Additional Information on Subsequent License Renewal Application (EPID No. L-2020-SLR-0000) - NRC Slides ML21132A2892021-05-13013 May 2021 SLRA RAI Response Public Meeting ML21145A2172021-05-13013 May 2021 Discussion on May 13, 2021 with Dominion on Select Staff RAIs on North Anna Subsequent License Renewal Application - Dominion Slides ML21034A5972021-02-10010 February 2021 External Presentation Am Atkinson_Nrc ISG-06 Meeting Dominion Digital IC Project 02102021 ML20288A3472020-10-14014 October 2020 (COVID-19) Emergency Preparedness Exemption Pre-Application Meeting ML20099F2412020-04-0909 April 2020 Co., NRC Safety Pre& 8208;Application Meeting North Anna Power Station (NAPS) ML20099F2992020-04-0909 April 2020 NRC Slides for North Anna pre-app April 9 ML20098B6022020-04-0707 April 2020 Annual Assessment Meeting Presentation ML19297D1872019-11-18018 November 2019 Pre-Application Meeting - Dominion Slides ML18141A3072018-05-21021 May 2018 18 - SLR Status ML16124A7582016-05-0303 May 2016 April 14, 2016, Summer of Public Meeting - North Anna, Units 1 and 2 ML16124A7632016-05-0303 May 2016 April 14, 2016, Summary of Public Meeting - North Anna Power Station, Units 1 and 2 ML15273A4292015-09-29029 September 2015 Revised Slides for September 29, 2015 Meeting with Dominion Re North Anna ISFSI License Renewal ML15133A0822015-05-13013 May 2015 ISFSI Presentation Slides - TN-32 High Burnup Dry Storage Research Project, May 13, 2015 (Tom Brookmire) ML15153A0452015-05-13013 May 2015 Revised North Anna ISFSI Presentation Slides - TN-32 High Burnup Dry Storage Research Project, May 13, 2015 (Tom Brookmire) ML15128A5462015-05-0808 May 2015 Summary of Public Meeting with North Anna, Units 1 and 2 to Discuss the Annual Assessment with the Public ML14058B1762014-03-0606 March 2014 Presentation Slides - North Anna ISFSI - High Burnup Dry Storage Confirmatory Data Project, TN-32 Storage Cask, Tom Brookmire, March 6, 2014, Docket No. 72-16, TAC No: L24886 ML14071A1672014-01-28028 January 2014 Enclosure 2: Presentation Slides - North Anna ISFSI TN-32 Cask and Pad 1 Assessments Following August 23, 2011, Central Virginia Earthquake ML13159A0092013-06-0404 June 2013 Notable Failures in Nondustructive Testing - June 4, 2013 Public Meeting ML12257A2342012-09-11011 September 2012 5-Hacker - North Anna Mockup and Search Unit Action Presentation Sept 10 ML12257A2002012-09-11011 September 2012 2-North Anna Extent of Condition Presentation 9-7-12 Sept 10 ML12131A5052012-05-0909 May 2012 Presentation for 2011 North Anna EOC Annual Assessment Meeting ML11305A0452011-11-0101 November 2011 Region II - North Anna Public Meeting Slides ML11305A0622011-11-0101 November 2011 Restart Readiness, Public Meeting PR2 ML1128500392011-10-12012 October 2011 Summary of Augmented Inspection Team Public Exit Meeting with Virginia Electric Power Company to Discuss the Results of an ATI Inspection of an Earthquake Event on August 23, 2011 ML11276A0242011-10-0303 October 2011 Slides-North Anna AIT Public Meeting October 3, 2011 ML1127701352011-10-0303 October 2011 Ltr to D. Heacock Re Participation in the Commission Meeting on the North Anna Plant on 10/21/11 ML11252A0062011-09-0808 September 2011 Dominion'S Slides Earthquake Response and North Anna Restart Readiness Demonstration Plan ML12040A2742011-08-31031 August 2011 E-Mail from G. Wilson, NRR to D. Merzke, EDO; Subject: Seismic Instruments at North Anna ML12044A2792011-08-30030 August 2011 Email from M. Khanna, NRR to R. Auluck, NRR FW: North Anna Earthquake Issue Commissioner Briefing Final with Talking Points ML1124205512011-08-30030 August 2011 Seismic Event ML12044A2912011-08-30030 August 2011 E-mail from G. Bowman, EDO to T. Hipschman, Comm, Et Al; Subject: FYI-Revised Slides on North Anna/Gl-199 ML12044A2572011-08-26026 August 2011 Email from A. Istar, NRR to A. Hiser, NRR on North Anna Nuclear Power Plant. Pptx ML1110304822011-04-13013 April 2011 Public Annual Assessment Meeting/Open House Slides ML1032204442010-11-18018 November 2010 Public Meeting Summary - North Anna Power Station ML1021102592010-08-0404 August 2010 Enclosure 3: Dominion - North Anna Presentation of July 28, 2010 Public Meeting ML1020100212010-07-14014 July 2010 Nucler Power Station, Units 1 and 2, Westinghouse RFA-2 Fuel Transition Licensing Meeting Presentation Slides ML1012600342010-05-0505 May 2010 Public Mtg. Slides ML1012600332010-05-0505 May 2010 Meeting Posters ML0917610472009-08-0505 August 2009 ECCS Preacs Filtration Presentation ML0912104262009-05-12012 May 2009 7th International Conference on NDE - Presentation :a Destructive Validation of NDE Responses of Service-Induced PWSCC Found in North Anna 2 Control Rod Drive Nozzle 31 ML0820501832008-07-23023 July 2008 Meeting Announcement - Summary of Public Meeting Category 1 - Performance Discussion Meeting, North Anna Power Station ML0812008742008-03-24024 March 2008 Annual Assessment Meeting Reactor Oversight Program - Cy 2007 2024-01-30
[Table view] |
Text
5/24/2021 North Anna SLRA RAI B2.1.7-1: Pitting and Crevice Corrosion in Reactor Vessel Internals T
1 1
RAF May 27, 2021 Dominions SLRA Recap
- Industry and plant-specific documents confirmed that loss of material due to pitting and crevice corrosion is not an aging effect requiring management for North Annas reactor vessel internal (RVI)
D components
- EPRI Materials Reliability Program
- Westinghouse Expert Panel Review for North Anna
- SLRA Table 3.1.1 Item 087 was identified as not applicable 2 May 27, 2021 2
1
5/24/2021 NRC Concerns
- The North Anna PWR Internals program is identified in SLRA B2.1.7 as consistent with GALL AMP XI.M16A
- GALL AMP XI.M16A, Element 2 Preventive Actions, states that the program relies on PWR water chemistry (GALL AMP XI.M2) to prevent/mitigate aging effects due to corrosive aging mechanisms (for example, pitting and crevice corrosion)
T
- Therefore, NUREG 2191 (SRP) Table 3.1-1 Item 087 should be identified as consistent rather than not applicable 3
3 RAF May 27, 2021 Dominions Proposed Path Forward
- The existing North Anna Water Chemistry program (SLRA B2.1.2), consistent with GALL AMP XI.M2 through its Preventive Actions element, is a mitigation program and does not provide for detection of any aging effects of concern for the components within its scope. The main objective of the program is to D mitigate loss of material due to corrosion and cracking due to SCC for stainless steel and nickel alloy components exposed to reactor coolant
- SLRA Section 3.1.2.2.9 is revised to state that pitting and crevice corrosion (in addition to SCC) are mitigated by the Water Chemistry program for RVI components
- SLRA Table 3.1.1 is revised to indicate that item 3.1.1-087 is consistent with NUREG 2191
- SLRA Table 3.1.2-2 is revised to add two new generic AMR lines for stainless steel and nickel alloy RVI components that cite Table 1 item 3.1.1-087 4 May 27, 2021 4
2
5/24/2021 Proposed Section 3.1.2.2.9 Addition T
5 5
RMay 27, 2021 AF Proposed Table 1 Change D
6 May 24, 2021 6
3
5/24/2021 Proposed Table 2 Addition T
Generic line for reactor vessel internal components will be included in lieu of individual component lines.
7 7
RMay 27, 2021 AF D
4
5/24/2021 North Anna SLRA RAI B2.1.15-1:
Diesel-Driven Fire Pump Engine Coolant Heat Exchanger T
1 1
RAF May 27, 2021 Dominions SLRA Recap
- Diesel-driven fire pump engine and skid-mounted subcomponents were originally addressed in SLRA as an active assembly, not subject to AMR per 10 CFR 54.21(a)(1)(i)
- Active status is consistent with NUREG-2192, Table 2.1-6 item 55. Equipment D
- performance is managed via Maintenance Rule Similar component was recently questioned at Peach Bottom and active status was accepted in RAI response, documented in SER 2.3.3.14.2 Dominion believes Table 2.3-2 excerpt is applicable to diesel generators, not fire pump diesel engines, which typically have integral subcomponents
- Staff noted that the engine coolant HX had experienced a tube failure in 2017; RAI questioned ability of active component testing to identify degradation prior to failure
2 May 27, 2021 2
1
5/24/2021 NRC Concerns
- Basis for 20 year periodic replacement frequency
- Two Diesel Assemblies have been in service for the Fire Pump application
- Engine 1 (Serial #10277066) is currently installed with 14 years of in-service time.
No HX OE.
- Engine 2 (Serial #10386949) had 29 years in service before developing a HX tube leak.
- Dominion Energy believes that a 20 year replacement frequency is T
conservative based on two engines in service for over 40 years with one HX tube leak. No further actions are required for SLR.
R 3 May 27, 2021 AF 3
Engine Installation History D
4 May 27, 2021 4
2
5/24/2021 Proposed Modified Commitment Change made to make commitment applicable to both T
in-service and spare engines.
5 5
R May 27, 2021 AF D
3
5/24/2021 North Anna SLRA RAI B2.1.27-1: Cyclic Fatigue of Buried Gray Cast Iron Piping Using Jockey Pump Monitoring RAI B2.1.21-1 Basis for Extent of Inspections For Selective Leaching RAI B2.1.21-2 Basis of Single 10-foot Sample For Selective Leaching T
1 1
R May 27, 2021 AF May 27 Discussion Topics
- Current Jockey Pump Monitoring
- Enhanced Jockey Pump Monitoring (Enhancement 6)
- Jockey Pump Monitoring: Operating Experience D
- Selective Leaching Extent of Inspections: XI.M35 Considerations Selective Leaching Extent of Inspections Selective Leaching Sample Size Selection Selective Leaching Leading Sample Location Conclusions 2 May 27, 2021 2
1
5/24/2021 Current Jockey Pump Monitoring
- Monitoring the activity of the jockey pump is allowed as an alternative to visual inspections by NUREG-2191 XI.M41 Buried and Underground Piping and Tanks.
- The water-based fire protection system is maintained at required operating pressure (95 to 110 psig) by the jockey pump (30 gpm) and hydropneumatics tank. When the jockey pump can not maintain system pressure due to leakage, the electric motor driven fire pump is auto started, and corrective actions are initiated.
- A low-pressure condition that is beyond the ability of the jockey pump to maintain system pressure is alarmed in the control room by the auto start of the electric motor driven fire pump (90 psig), followed by the start of the diesel-driven fire pump if the system pressure condition continues to decrease (52 psig or 80 psig with elevation difference).
T There are control room vertical board annunciators that provide alarms for the diesel and electric motor driven pumps running or trouble and system initiated and trouble with corresponding operator actions.
Reference:
UFSAR 9.5.1.2 and alarm response procedures 3
3 RAF May 27, 2021 Enhanced Jockey Pump Monitoring (Enhancement 6)
- Fire Water System Program Enhancement 6: The activity of the jockey pump (i.e. an increase in the number of pump starts or run time of the pump) will be monitored consistent with NUREG-2191 Section XI.M41 Element 4.
- Jockey pump performance information (run time) will be monitored monthly D (not-to-exceed) by the program engineer and used to project and prevent unexpected fire pump starts.
- Installation of a jockey pump motor run time totalizer has been requested.
- Further investigations will be performed and corrective actions as appropriate:
- If jockey pump motor run time projections can not be projected to the next monthly monitoring or an unexpected fire pump start occurs.
- If an unexpected pump start is not due to a fire system actuation or planned maintenance/testing, then further investigation will be performed to identify/isolate a potential leak.
4 May 27, 2021 4
2
5/24/2021 Jockey Pump Operating Experience
- The system is designed to sequentially start the fire pumps on decreasing pressure to avoid simultaneous pump starts and the potential for an overpressure event.
- Maintenance, system testing, and/or abnormal plant configurations may result in unexpected pump starts. System procedures have been previously revised to anticipate potential pump starts and often require the electric fire pump to be started as a prerequisite to testing or maintenance.
- There has been no through wall leaks or cracking of buried gray cast iron piping with cementitious lining since 2003.
- A review of the last 5 years of condition reports identified 6 unexpected pump starts:
- 2 diesel pump starts with electric pump running during transformer deluge testing
- 4 electric pump starts with warehouse cross-tie open due to warehouse fire protection maintenance or diesel/motor pump maintenance T
Unexpected pump starts were not simultaneous or due to system leakage
- A recent condition report was initiated to investigate avoiding unnecessary pressure events 5
5 RAF May 27, 2021 Selective Leaching Extent of Inspection: XI.M35 Considerations D
6 May 27, 2021 6
3
5/24/2021 Selective Leaching Extent of Inspection Extent of inspections for cracking and loss of material of cementitiously lined buried gray cast iron fire protection piping is based on one-time, periodic and opportunistic inspections that consider:
- One-time inspections prior to the SPEO (c/w XI.M35):
- Sample size: 10% of the total population up to maximum of 25 components per Unit This more than triples the XI.M33 inspections (i.e. 25 vs 8) prior to the SPEO
- Exam Method: visual or destructive exams with destructive exams credited twice toward the total sample - minimum of 3 destructive exams
- Periodic inspections in the SPEO (c/w XI.M33):
- Sample size: 3% of the total population up to maximum of 8 components per Unit T
Exam Method: visual or destructive exams with destructive exams credited twice toward the total sample - mandatory 2 destructive exams in addition to total of 8 Opportunistic: Opportunistic inspections using enhanced jockey pump monitoring are credited as periodic or one-time inspections as long as sample selection criteria are met - assume one or two excavations per period 7
7 RAF May 27, 2021 Selective Leaching Sample Size Selection Inspection samples will be harvested by excavating 10-foot piping segments. Each excavated piping segment will provide 10 samples for visual or destructive examinations.
- Selection of piping excavation location consistent with leading sample criteria
- The fire protection system is a common system to Unit 1 and Unit 2. Due to the ductile piping replacement on Unit 2, excavations for piping within the scope of license renewal will be D performed independent of Unit designator and based on leading sample criteria
- NUREG-2191 considers each 1-foot piping segment (or equivalent 1-foot segment) as 1 component: M33, M36, M38 (any combination of 1-foot lengths), M41 (inspections based on 10-foot lengths), and M42
- Excavating 10-foot piping segments for inspection is consistent with NUREG-2191 XI.M41 Based on Table XI.M41-2 for cathodic protection meeting availability and effectiveness performance criteria, one inspection of a 10-foot piping length of buried gray cast iron piping would be required every ten years
- Opportunistic inspections based on enhanced jockey pump monitoring to target specific piping leakage issues will augment periodic sampling - informed opportunistic inspections as a result of enhanced jockey pump monitoring are an efficient use of resources 8 May 27, 2021 8
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5/24/2021 Selective Leaching Leading Sample Location Based on operating experience, inspection locations focused on the bounding or lead piping most susceptible to aging
- Older piping segments (i.e. not previously replaced)
- Piping found to be continuously wetted due to leaking piping/valves or in soil with high corrosivity ratings as determined by EPRI Report 3002005294
- Piping that is not cathodically protected
- Piping with significant coating degradation or unexpected backfill
- Consequence of failure (i.e. proximity to safety-related piping)
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- Pipe locations with potentially high stress and/or cyclic loading conditions such as piping adjacent to locations that were replaced due to cracking/rupture, locations subject to settlement, or locations subject to heavy load traffic 9
9 RAF May 27, 2021 Conclusions The previous information demonstrates with reasonable assurance that the intended function of the buried lined gray cast iron fire protection piping will be maintained throughout the subsequent period of extended operation.
- Enhanced jockey pump monitoring and trending using pump run time projections to prevent unexpected fire pump starts due to leakage will be implemented prior to the SPEO
- Opportunistic inspections including those based on enhanced jockey pump monitoring to D target specific piping leakage issues will efficiently augment sampling inspections
- Selective Leaching program extent of inspections are appropriate based upon one-time inspections (pre-SPEO), periodic inspections (SPEO), opportunistic inspection informed by enhanced jockey pump monitoring, continued use of in-house metallurgical lab for destructive examinations, and AMP effectiveness/OE
- Selective Leaching one-time inspections (pre-SPEO) more than triples the XI.M33 inspections with 50 components rather than 16 components inspected at both Units
- Selective Leaching periodic inspections (SPEO) are consistent with XI.M33
- Selection of periodic Selective Leaching program piping excavation locations are consistent with NUREG-2191 guidance for other piping segment inspections and will be consistent with leading sample criteria 10 May 27, 2021 10 5
5/24/2021 North Anna SLRA RAI B2.1.35-1:
Settlement Monitoring: Service Water Valve House (Settlement Marker SM-28)
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1 RAF May 27, 2021 Dominions SLRA Recap
- Settlement monitoring of Class I structures is governed by TRM 3.7.7. Per the TRM, if a monitored location exceeds 75% of the TRM allowable settlement:
o TRM requires a Condition Report (CR) be submitted immediately; o Within 60 days, engineering is to review field conditions and evaluate the consequences of additional settlement.
D o If a monitored location exceeds 100% of the TRM allowable settlement, the affected unit is to be in MODE 3 within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and MODE 5 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.
- On April 21, A CR was submitted to note that settlement of SM-28, which is associated with the SWVH, had slightly exceeded 75% of the TRM 3.7.7 allowable value (current SM-28 settlement is 75.6% of the allowable).
- As noted in the CR, there is no challenge to the functionality of plant equipment, and based on data, settlement of SM-28 is projected to remain below the 100%
allowable settlement limit established in TRM 3.7.7 until at least 2036.
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5/24/2021 Dominions SLRA Recap, cont.
- As further noted in TRM 3.7.7 bases, the allowable settlement for SM-28, as well as other SWVH settlement markers, is based on limiting SW pipe stresses.
o To address potential future SWVH settlement, SW piping expansion joint tie-rods will be adjusted to allow for additional settlement.
o After SW Piping expansion joint tie-rods adjustments, the allowable settlement for the SWVH settlement markers will be re-baselined to the expansion joint tie-rod adjustment date (Note that this approach is similar to the approach taken in 2009).
- Dominion Energy believes that the CLB and the oversight of the regulatory framework will ensure appropriate actions are taken as T
delineated in TRM 3.7.7 prior to the SPEO. No further actions are required for SLR.
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RAF May 27, 2021 D
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